ci(release): update pnpm/action-setup to v4 and pin pnpm to 8

- Upgrade pnpm/action-setup action from v3 to v4 in release workflow
- Pin pnpm version to 8 instead of using latest in workflow
- Remove generated webpack hot-update files from dist directory

Author: EvanNotFound

.github/workflows/release.yml

@@ -19,9 +19,9 @@ jobs:
           fetch-depth: 0
 
       - name: Setup PNPM
-        uses: pnpm/action-setup@v3
+        uses: pnpm/action-setup@v4
         with:
-          version: latest
+          version: 8
 
       - name: Setup Node.js
         uses: actions/setup-node@v4